Error: You must use Bundler 2 or greater with this lockfile

1

how do I fix this:

$ jekyll help
Traceback (most recent call last):
	13: from /Users/brandomiranda/.gem/ruby/2.6.0/bin/jekyll:23:in `<main>'
	12: from /Users/brandomiranda/.gem/ruby/2.6.0/bin/jekyll:23:in `load'
	11: from /Users/brandomiranda/.gem/ruby/2.6.0/gems/jekyll-4.0.0/exe/jekyll:11:in `<top (required)>'
	10: from /Users/brandomiranda/.gem/ruby/2.6.0/gems/jekyll-4.0.0/lib/jekyll/plugin_manager.rb:52:in `require_from_bundler'
	 9: from /usr/local/Cellar/ruby/2.6.4_2/lib/ruby/2.6.0/bundler.rb:101:in `setup'
	 8: from /usr/local/Cellar/ruby/2.6.4_2/lib/ruby/2.6.0/bundler.rb:135:in `definition'
	 7: from /usr/local/Cellar/ruby/2.6.4_2/lib/ruby/2.6.0/bundler/definition.rb:34:in `build'
	 6: from /usr/local/Cellar/ruby/2.6.4_2/lib/ruby/2.6.0/bundler/dsl.rb:13:in `evaluate'
	 5: from /usr/local/Cellar/ruby/2.6.4_2/lib/ruby/2.6.0/bundler/dsl.rb:234:in `to_definition'
	 4: from /usr/local/Cellar/ruby/2.6.4_2/lib/ruby/2.6.0/bundler/dsl.rb:234:in `new'
	 3: from /usr/local/Cellar/ruby/2.6.4_2/lib/ruby/2.6.0/bundler/definition.rb:83:in `initialize'
	 2: from /usr/local/Cellar/ruby/2.6.4_2/lib/ruby/2.6.0/bundler/definition.rb:83:in `new'
	 1: from /usr/local/Cellar/ruby/2.6.4_2/lib/ruby/2.6.0/bundler/lockfile_parser.rb:95:in `initialize'
/usr/local/Cellar/ruby/2.6.4_2/lib/ruby/2.6.0/bundler/lockfile_parser.rb:108:in `warn_for_outdated_bundler_version': You must use Bundler 2 or greater with this lockfile. (Bundler::LockfileError)
2

gem install bundler